History: 36 year old man with renal cell carcinoma, on dialysis and carbon dioxide retention.

Findings: There is a triangular shaped opacity in the right upper lung field that obscures the ascending aorta. There is also an elevation of the horizontal (minor) fissure, and an elevation of the right hemidiaphragm, which are all radiological signs consistent with atelectasis of the right upper lobe.

Ddx: Atelectasis can be caused mucous plug, cancer, foreign body, or shallow breathing due to pain or discomfort.

MPX2503_synpic58355: This is an AP film of the chest. There is a catheter in the right internal jugular vein, an endotracheal tube, and an enteric tube overlying the left upper quadrant. There is a triangular shaped opacity in the right upper lung field that obscures the ascending aorta. There is also an elevation of the horizontal (minor) fissure, and an elevation of the right hemidiaphragm, which are all radiological signs consistent with atelectasis of the right upper lobe.

MPX2503_synpic58355: This is an AP film of the chest. There is a catheter in the right internal jugular vein, an endotracheal tube, and an enteric tube overlying the left upper quadrant. There is a triangular shaped opacity in the right upper lung field that obscures the ascending aorta. There is also an elevation of the horizontal (minor) fissure, and an elevation of the right hemidiaphragm, which are all radiological signs consistent with atelectasis of the right upper lobe.

History: 36 year old man with renal cell carcinoma, on dialysis and carbon dioxide retention.

Findings: There is a triangular shaped opacity in the right upper lung field that obscures the ascending aorta. There is also an elevation of the horizontal (minor) fissure, and an elevation of the right hemidiaphragm, which are all radiological signs consistent with atelectasis of the right upper lobe.

Ddx: Atelectasis can be caused mucous plug, cancer, foreign body, or shallow breathing due to pain or discomfort.